Abstract
An investigation was conducted to evaluate the seismic behavior of a new type of steel box-section bridge piers with embedded energy dissipation shell plates. In this study, two sets of the new steel box-section bridge piers were designed and pseudo-static tests were carried out on ten steel box bridge piers under constant axial force, with a horizontal cyclic load on top of the piers. The change regularities of the failure mode, the patterns of local buckling, the load–displacement hysteresis curve and its curve skeletons, and the load-strain hysteresis curves of the specimens were analyzed. The rules of horizontal stiffener spacing on embedded shell plates, the axial compression ratio, the embedded shell strength, and the layout of longitudinal ribs in the box-section wallboards were obtained to evaluate their influence on the seismic behavior of the new-type steel piers. The test results indicated that, after installing the embedded shells, the deformation ability of steel box-section bridge piers was enhanced and their ductility was improved. The effects of axial compression ratio and the space of transverse stiffeners in embedded shells on the seismic behavior of the new steel piers were significant. When the space of the horizontal stiffeners on the embedded shells and the axial compression ratio become smaller, the bearing capacity and ultimate displacement capability of the specimens would be greater, the descent segment of the curve skeleton would be more gradual, and the deformability and ductility of the new-type steel piers would be better. The effects of setting longitudinal stiffening ribs and enhanced embedded shell strength on the bearing capacity and ductility of the steel box bridge piers were relatively small. Based on the experimental results, calculation equations were established for stable bearing capacity and maximum deformation of the new-type steel piers, under the constant axial force and horizontal cyclic loading, in order to promote their seismic design.
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Abbreviations
- L :
-
Length of a column
- h :
-
Height of box cross section
- b :
-
Width of box cross section
- t w :
-
Thickness of a web plate
- t f :
-
Thickness of a flange plate
- f :
-
Strength of embedded shell plate
- θ :
-
Radian of embedded shell plate
- DS :
-
Space of transverse stiffeners on embedded shell plates
- DL :
-
Length of embedded shell plate
- A :
-
Area of box cross section
- W :
-
Section modulus
- I :
-
Inertia moment
- N :
-
Vertical compressed load
- V :
-
Lateral cyclic load
- E :
-
Young’s modules
- μ :
-
Displacement ductility coefficient
- n :
-
Axial compression ratio
- f y :
-
Yield strength of steel
- f u :
-
Ultimate strength of steel
- M :
-
Bending moment
- N E :
-
Euler force
- M P :
-
Cross-sectional plastic bending moment
- δ :
-
Cyclic horizontal displacement
- δ u :
-
Horizontal displacement
- δ y :
-
Theoretical value of the lateral shift at the top of a eccentrically-compressed column
- ɛ :
-
Strain
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Acknowledgements
The research reported in the paper is supported by the National Natural Science Foundation of China (Nos. 51778248 and 51408240), the Promotion Program for Young and Middle-aged Teacher in Science and Technology Research of Huaqiao University (No. ZQN-PY312) and the Natural Science Foundation of Fujian Province (No. 2018J01075). The financial support is highly appreciated.
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Li, H., Luo, J., Han, F. et al. Experimental Study on Seismic Behavior of New Steel Box Bridge Piers with Embedded Energy Dissipation Shells. Int J Steel Struct 19, 952–969 (2019). https://doi.org/10.1007/s13296-018-0181-0
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DOI: https://doi.org/10.1007/s13296-018-0181-0